The Sorensen QRB40 is a regulated DC power supply delivering 0–40 V and 0–0.75 A with exceptional output stability and low noise characteristics. Designed for precision test and measurement environments, this unit combines tight line and load regulation with fast transient response and integrated protection features. The front panel offers continuously variable voltage and current adjustment via potentiometers, with dual LED indicators showing Constant Voltage (CV) and Constant Current (CC) operation modes.
Technical Specifications
Output Rating
• Voltage: 0–40 V
• Current: 0–0.75 A
Regulation & Stability
• Line regulation: ≤0.01% + 1 mV
• Load regulation: ≤0.02% + 2 mV
• Ripple & noise (RMS): ≤0.5 mV
• Temperature coefficient: ≤0.01% per °C
• Transient response: 50 µs for 50% load change
Power Input
• Selectable 105–125 VAC or 210–250 VAC, 47–63 Hz
Environmental Range
• Operating temperature: 0°C to 50°C
• Storage temperature: −40°C to 70°C
• Humidity: 20% to 85% RH, non-condensing
– Key Features
• Convection cooling for passive operation
• Automatic foldback current limiting protects against overload
• Withstands continuous short circuit operation in CC mode
• Front panel binding posts accept banana plugs and bare wire
• Dual-range input voltage selection eliminates external transformers
– Typical Applications
• Component characterization and burn-in testing
• Prototype development and bench validation
• Automated test equipment (ATE) subsystems
• Educational laboratory environments
– Compatibility & Integration
The QRB40’s compact form factor and straightforward potentiometer-based controls enable rapid integration into existing test racks and measurement setups. Standard binding post outputs interface directly with common laboratory cables and fixtures.
